/**
* @file friend_server.hpp
* @author zhaobohan (zhaobohan_free@163.com)
* @brief 实现好友添加管理服务
*/
#include <brpc/server.h>
#include <butil/logging.h>
#include "data_es.hpp"      // es数据管理客户端封装
#include "mysql_chat_session_member.hpp"      // mysql数据管理客户端封装
#include "mysql_chat_session.hpp"      // mysql数据管理客户端封装
#include "mysql_relation.hpp"      // mysql数据管理客户端封装
#include "mysql_apply.hpp"      // mysql数据管理客户端封装
#include "etcd.hpp"     // 服务注册模块封装
#include "logger.hpp"   // 日志模块封装
#include "utils.hpp"    // 基础工具接口
#include "channel.hpp"  // 信道管理模块封装
#include "friend.pb.h"  // protobuf框架代码
#include "base.pb.h"  // protobuf框架代码
#include "user.pb.h"  // protobuf框架代码
#include "message.pb.h"  // protobuf框架代码

namespace free_im {

// 对于rpc调用的具体实现
class FriendServiceImpl : public free_im::FriendService 
{
public:
    FriendServiceImpl(
        const std::shared_ptr<elasticlient::Client> &es_client,
        const std::shared_ptr<odb::core::database> &mysql_client,
        const ServiceManager::ptr &channel_manager,
        const std::string &user_service_name,
        const std::string &message_service_name) :
        _es_user(std::make_shared<ESUser>(es_client)),
        _mysql_apply(std::make_shared<FriendApplyTable>(mysql_client)),
        _mysql_chat_session(std::make_shared<ChatSessionTable>(mysql_client)),
        _mysql_chat_session_member(std::make_shared<ChatSessionMemeberTable>(mysql_client)),
        _mysql_relation(std::make_shared<RelationTable>(mysql_client)),
        _user_service_name(user_service_name),
        _message_service_name(message_service_name),
        _mm_channels(channel_manager)
    {}

    ~FriendServiceImpl()
    {}

    // 根据用户获取它的好友，组装好友的信息，返回
    void GetFriendList(::google::protobuf::RpcController* controller,
        const ::free_im::GetFriendListReq* request,
        ::free_im::GetFriendListRsp* response,
        ::google::protobuf::Closure* done) 
    {
        brpc::ClosureGuard rpc_guard(done);
        // 定义错误回调
        auto err_response = [this, response](const std::string &rid, 
            const std::string &errmsg) -> void {
            response->set_request_id(rid);
            response->set_success(false);
            response->set_errmsg(errmsg);
            return;
        };
        
        // 1. 提取请求中的关键要素：用户ID
        std::string rid = request->request_id();
        std::string uid = request->user_id();

        // 2. 从数据库中查询获取用户的好友ID
        auto friend_id_lists = _mysql_relation->friends(uid);
        std::unordered_set<std::string> user_id_lists;
        for (auto &id : friend_id_lists) 
        {
            user_id_lists.insert(id);
        }

        // 3. 从用户子服务批量获取用户信息
        std::unordered_map<std::string, UserInfo> user_list;
        bool ret = GetUserInfo(rid, user_id_lists, user_list);
        if (ret == false) 
        {
            LOG_ERROR("{} - 批量获取用户信息失败!", rid);
            return err_response(rid, "批量获取用户信息失败!");
        }

        // 4. 组织响应
        response->set_request_id(rid);
        response->set_success(true);
        for (const auto & user_it : user_list) 
        {
            auto user_info = response->add_friend_list();
            user_info->CopyFrom(user_it.second);
        }
    }

    // 移除指定用户的某个好友信息
    void FriendRemove(::google::protobuf::RpcController* controller,
        const ::free_im::FriendRemoveReq* request,
        ::free_im::FriendRemoveRsp* response,
        ::google::protobuf::Closure* done) 
    {
        brpc::ClosureGuard rpc_guard(done);
        // 定义错误回调
        auto err_response = [this, response](const std::string &rid, 
            const std::string &errmsg) -> void {
            response->set_request_id(rid);
            response->set_success(false);
            response->set_errmsg(errmsg);
            return;
        };

        // 1. 提取关键要素：当前用户ID，要删除的好友ID
        std::string rid = request->request_id();
        std::string uid = request->user_id();
        std::string pid = request->peer_id();

        // 2. 从好友关系表中删除好友关系信息
        bool ret = _mysql_relation->remove(uid, pid);
        if (ret == false) 
        {
            LOG_ERROR("{} - 从数据库删除好友信息失败！", rid);
            return err_response(rid, "从数据库删除好友信息失败！");
        }

        // 3. 从会话信息表中，删除对应的聊天会话 -- 同时删除会话成员表中的成员信息
        ret = _mysql_chat_session->remove(uid, pid);
        if (ret == false) 
        {
            LOG_ERROR("{}- 从数据库删除好友会话信息失败！", rid);
            return err_response(rid, "从数据库删除好友会话信息失败！");
        }

        // 4. 组织响应
        response->set_request_id(rid);
        response->set_success(true);
    }

    // 添加好友
    void FriendAdd(::google::protobuf::RpcController* controller,
        const ::free_im::FriendAddReq* request,
        ::free_im::FriendAddRsp* response,
        ::google::protobuf::Closure* done) 
    {
        brpc::ClosureGuard rpc_guard(done);
        // 定义错误回调
        auto err_response = [this, response](const std::string &rid, 
            const std::string &errmsg) -> void {
            response->set_request_id(rid);
            response->set_success(false);
            response->set_errmsg(errmsg);
            return;
        };
        // 1. 提取请求中的关键要素：申请人用户ID； 被申请人用户ID
        std::string rid = request->request_id();
        std::string uid = request->user_id();
        std::string pid = request->respondent_id();

        // 2. 判断两人是否已经是好友
        bool ret = _mysql_relation->exists(uid, pid);
        if (ret == true) 
        {
            LOG_ERROR("{}- 申请好友失败-两者{}-{}已经是好友关系", rid, uid, pid);
            return err_response(rid, "两者已经是好友关系！");
        }

        // 3. 当前是否已经申请过好友
        ret = _mysql_apply->exists(uid, pid);
        if (ret == true) 
        {
            LOG_ERROR("{}- 申请好友失败-已经申请过对方好友！", rid, uid, pid);
            return err_response(rid, "已经申请过对方好友！");
        }

        // 4. 向好友申请表中，新增申请信息
        std::string eid = uuid();
        FriendApply ev(eid, uid, pid);
        ret = _mysql_apply->insert(ev);
        if (ret == false) 
        {
            LOG_ERROR("{} - 向数据库新增好友申请事件失败！", rid);
            return err_response(rid, "向数据库新增好友申请事件失败！");
        }
        // 5. 组织响应
        response->set_request_id(rid);
        response->set_success(true);
        response->set_notify_event_id(eid);
    }
    virtual void FriendAddProcess(::google::protobuf::RpcController* controller,
        const ::free_im::FriendAddProcessReq* request,
        ::free_im::FriendAddProcessRsp* response,
        ::google::protobuf::Closure* done) {
        brpc::ClosureGuard rpc_guard(done);
        // 定义错误回调
        auto err_response = [this, response](const std::string &rid, 
            const std::string &errmsg) -> void {
            response->set_request_id(rid);
            response->set_success(false);
            response->set_errmsg(errmsg);
            return;
        };
        //1. 提取请求中的关键要素：申请人用户ID；被申请人用户ID；处理结果；事件ID
        std::string rid = request->request_id();
        std::string eid = request->notify_event_id();
        std::string uid = request->user_id(); //被申请人
        std::string pid = request->apply_user_id();//申请人
        bool agree = request->agree();
        //2. 判断有没有该申请事件
        bool ret = _mysql_apply->exists(pid, uid);
        if (ret == false) {
            LOG_ERROR("{}- 没有找到{}-{}对应的好友申请事件！", rid, pid, uid);
            return err_response(rid, "没有找到对应的好友申请事件!");
        }
        //3. 如果有： 可以处理； --- 删除申请事件--事件已经处理完毕
        ret = _mysql_apply->remove(pid, uid);
        if (ret == false) {
            LOG_ERROR("{}- 从数据库删除申请事件 {}-{} 失败！", rid, pid, uid);
            return err_response(rid, "从数据库删除申请事件失败!");
        }
        //4. 如果处理结果是同意：向数据库新增好友关系信息；新增单聊会话信息及会话成员
        std::string cssid;
        if (agree == true) {
            ret = _mysql_relation->insert(uid, pid);
            if (ret == false) {
                LOG_ERROR("{}- 新增好友关系信息-{}-{}！", rid, uid, pid);
                return err_response(rid, "新增好友关系信息!");
            }
            cssid = uuid();
            ChatSession cs(cssid, "", ChatSessionType::SINGLE);
            ret = _mysql_chat_session->insert(cs);
            if (ret == false) {
                LOG_ERROR("{}- 新增单聊会话信息-{}！", rid, cssid);
                return err_response(rid, "新增单聊会话信息失败!");
            }
            ChatSessionMember csm1(cssid, uid);
            ChatSessionMember csm2(cssid, pid);
            std::vector<ChatSessionMember> mlist = {csm1, csm2};
            ret = _mysql_chat_session_member->append(mlist);
            if (ret == false) {
                LOG_ERROR("{}- 没有找到{}-{}对应的好友申请事件！", rid, pid, uid);
                return err_response(rid, "没有找到对应的好友申请事件!");
            }
        }
        //5. 组织响应
        response->set_request_id(rid);
        response->set_success(true);
        response->set_new_session_id(cssid);
    }

    // 搜索好友
    void FriendSearch(::google::protobuf::RpcController* controller,
        const ::free_im::FriendSearchReq* request,
        ::free_im::FriendSearchRsp* response,
        ::google::protobuf::Closure* done) 
    {
        brpc::ClosureGuard rpc_guard(done);
        // 定义错误回调
        auto err_response = [this, response](const std::string &rid, 
            const std::string &errmsg) -> void {
            response->set_request_id(rid);
            response->set_success(false);
            response->set_errmsg(errmsg);
            return;
        };

        // 1. 提取请求中的关键要素：搜索关键字（可能是用户ID，可能是手机号，可能是昵称的一部分）
        std::string rid = request->request_id();
        std::string uid = request->user_id();
        std::string skey = request->search_key();
        LOG_DEBUG("{} 好友搜索 ： {}", uid, skey);

        // 2. 根据用户ID，获取用户的好友ID列表
        auto friend_id_lists = _mysql_relation->friends(uid);

        // 3. 从ES搜索引擎进行用户信息搜索 --- 过滤掉当前的好友
        std::unordered_set<std::string> user_id_lists;
        friend_id_lists.push_back(uid);// 把自己也过滤掉
        auto search_res = _es_user->search(skey, friend_id_lists);
        for (auto &it : search_res) 
        {
            user_id_lists.insert(it.user_id());
        }

        // 4. 根据获取到的用户ID， 从用户子服务器进行批量用户信息获取
        std::unordered_map<std::string, UserInfo> user_list;
        bool ret = GetUserInfo(rid, user_id_lists, user_list);
        if (ret == false) {
            LOG_ERROR("{} - 批量获取用户信息失败!", rid);
            return err_response(rid, "批量获取用户信息失败!");
        }

        // 5. 组织响应
        response->set_request_id(rid);
        response->set_success(true);
        for (const auto & user_it : user_list) 
        {
            auto user_info = response->add_user_info();
            user_info->CopyFrom(user_it.second);
        }
    }

    // 获取申请好友列表
    void GetPendingFriendEventList(::google::protobuf::RpcController* controller,
        const ::free_im::GetPendingFriendEventListReq* request,
        ::free_im::GetPendingFriendEventListRsp* response,
        ::google::protobuf::Closure* done) 
    {
        brpc::ClosureGuard rpc_guard(done);
        // 定义错误回调
        auto err_response = [this, response](const std::string &rid, 
            const std::string &errmsg) -> void {
            response->set_request_id(rid);
            response->set_success(false);
            response->set_errmsg(errmsg);
            return;
        };
        // 1. 提取关键要素：当前用户ID
        std::string rid = request->request_id();
        std::string uid = request->user_id();

        // 2. 从数据库获取待处理的申请事件信息 --- 申请人用户ID列表
        auto res = _mysql_apply->applyUsers(uid);
        std::unordered_set<std::string> user_id_lists;
        for (auto &id : res) 
        {
            user_id_lists.insert(id);
        }

        // 3. 批量获取申请人用户信息、
        std::unordered_map<std::string, UserInfo> user_list;
        bool ret = GetUserInfo(rid, user_id_lists, user_list);
        if (ret == false) 
        {
            LOG_ERROR("{} - 批量获取用户信息失败!", rid);
            return err_response(rid, "批量获取用户信息失败!");
        }

        // 4. 组织响应
        response->set_request_id(rid);
        response->set_success(true);
        for (const auto & user_it : user_list) 
        {
            auto ev = response->add_event();
            ev->mutable_sender()->CopyFrom(user_it.second);
        }
    }

    // 获取历史聊天会话
    void GetChatSessionList(::google::protobuf::RpcController* controller,
        const ::free_im::GetChatSessionListReq* request,
        ::free_im::GetChatSessionListRsp* response,
        ::google::protobuf::Closure* done) 
    {
        brpc::ClosureGuard rpc_guard(done);
        // 定义错误回调
        auto err_response = [this, response](const std::string &rid, 
            const std::string &errmsg) -> void {
            response->set_request_id(rid);
            response->set_success(false);
            response->set_errmsg(errmsg);
            return;
        };

        // 1. 提取请求中的关键要素：当前请求用户ID
        std::string rid = request->request_id();
        std::string uid = request->user_id();

        // 2. 从数据库中查询出用户的单聊会话列表
        auto sf_list = _mysql_chat_session->singleChatSession(uid);

        // 3. 从单聊会话列表中，取出所有的好友ID，从用户子服务获取用户信息
        std::unordered_set<std::string> users_id_list;
        for (const auto &f : sf_list) 
        {
            users_id_list.insert(f.friend_id);
        }

        std::unordered_map<std::string, UserInfo> user_list;
        bool ret = GetUserInfo(rid, users_id_list, user_list);
        if (ret == false) 
        {
            LOG_ERROR("{} - 批量获取用户信息失败！", rid);
            return err_response(rid, "批量获取用户信息失败!");
        }
        // 4. 设置响应会话信息：会话名称就是好友名称；会话头像就是好友头像
        // 5. 从数据库中查询出用户的群聊会话列表
        auto gc_list = _mysql_chat_session->groupChatSession(uid);

        // 6. 组织响应
        for (const auto &f : sf_list) 
        {
            auto chat_session_info = response->add_chat_session_info_list();
            chat_session_info->set_single_chat_friend_id(f.friend_id);
            chat_session_info->set_chat_session_id(f.chat_session_id);
            chat_session_info->set_chat_session_name(user_list[f.friend_id].nickname());
            chat_session_info->set_avatar(user_list[f.friend_id].avatar());
            MessageInfo msg;
            ret = GetRecentMsg(rid, f.chat_session_id, msg);
            if (ret == false) {continue;}
            chat_session_info->mutable_prev_message()->CopyFrom(msg);
        }

        for (const auto &f : gc_list) 
        {
            auto chat_session_info = response->add_chat_session_info_list();
            chat_session_info->set_chat_session_id(f.chat_session_id);
            chat_session_info->set_chat_session_name(f.chat_session_name);
            MessageInfo msg;
            ret = GetRecentMsg(rid, f.chat_session_id, msg);
            if (ret == false) { continue; }
            chat_session_info->mutable_prev_message()->CopyFrom(msg);
        }

        response->set_request_id(rid);
        response->set_success(true);
    }

    // 创建聊天会话
    void ChatSessionCreate(::google::protobuf::RpcController* controller,
        const ::free_im::ChatSessionCreateReq* request,
        ::free_im::ChatSessionCreateRsp* response,
        ::google::protobuf::Closure* done) 
    {
        brpc::ClosureGuard rpc_guard(done);
        // 定义错误回调
        auto err_response = [this, response](const std::string &rid, 
            const std::string &errmsg) -> void {
            response->set_request_id(rid);
            response->set_success(false);
            response->set_errmsg(errmsg);
            return;
        };
        // 创建会话，其实针对的是用户要创建一个群聊会话
        // 1. 提取请求关键要素：会话名称，会话成员
        std::string rid = request->request_id();
        std::string uid = request->user_id();
        std::string cssname = request->chat_session_name();
        
        // 2. 生成会话ID，向数据库添加会话信息，添加会话成员信息
        std::string cssid = uuid();
        ChatSession cs(cssid, cssname, ChatSessionType::GROUP);
        bool ret = _mysql_chat_session->insert(cs);
        if (ret == false) 
        {
            LOG_ERROR("{} - 向数据库添加会话信息失败: {}", rid, cssname);
            return err_response(rid, "向数据库添加会话信息失败!");
        }
        std::vector<ChatSessionMember> member_list;
        for (int i = 0; i < request->member_id_list_size(); i++) 
        {
            ChatSessionMember csm(cssid, request->member_id_list(i));
            member_list.push_back(csm);
        }

        ret = _mysql_chat_session_member->append(member_list);
        if (ret == false) 
        {
            LOG_ERROR("{} - 向数据库添加会话成员信息失败: {}", rid, cssname);
            return err_response(rid, "向数据库添加会话成员信息失败!");
        }

        // 3. 组织响应---组织会话信息
        response->set_request_id(rid);
        response->set_success(true);
        response->mutable_chat_session_info()->set_chat_session_id(cssid);
        response->mutable_chat_session_info()->set_chat_session_name(cssname);
    }

    // 获取会话中的全部成员
    void GetChatSessionMember(::google::protobuf::RpcController* controller,
        const ::free_im::GetChatSessionMemberReq* request,
        ::free_im::GetChatSessionMemberRsp* response,
        ::google::protobuf::Closure* done) 
    {
        brpc::ClosureGuard rpc_guard(done);
        // 定义错误回调
        auto err_response = [this, response](const std::string &rid, 
            const std::string &errmsg) -> void {
            response->set_request_id(rid);
            response->set_success(false);
            response->set_errmsg(errmsg);
            return;
        };
        // 用于用户查看群聊成员信息的时候：进行成员信息展示
        // 1. 提取关键要素：聊天会话ID
        std::string rid = request->request_id();
        std::string uid = request->user_id();
        std::string cssid = request->chat_session_id();

        // 2. 从数据库获取会话成员ID列表
        auto member_id_lists = _mysql_chat_session_member->members(cssid);
        std::unordered_set<std::string> uid_list;
        for (const auto &id : member_id_lists) 
        {
            uid_list.insert(id);
        }

        // 3. 从用户子服务批量获取用户信息
        std::unordered_map<std::string, UserInfo> user_list;
        bool ret = GetUserInfo(rid, uid_list, user_list);
        if (ret == false) 
        {
            LOG_ERROR("{} - 从用户子服务获取用户信息失败！", rid);
            return err_response(rid, "从用户子服务获取用户信息失败!");
        }

        // 4. 组织响应
        response->set_request_id(rid);
        response->set_success(true);
        for (const auto &uit : user_list) 
        {
            auto user_info = response->add_member_info_list();
            user_info->CopyFrom(uit.second);
        }
    }

private:
    bool GetRecentMsg(const std::string &rid, 
        const std::string &cssid, MessageInfo &msg) 
    {
        auto channel = _mm_channels->choose(_message_service_name);
        if (!channel) 
        {
            LOG_ERROR("{} - 获取消息子服务信道失败！！", rid);
            return false;
        }
        GetRecentMsgReq req;
        GetRecentMsgRsp rsp;
        req.set_request_id(rid);
        req.set_chat_session_id(cssid);
        req.set_msg_count(1);
        brpc::Controller cntl;
        free_im::MsgStorageService_Stub stub(channel.get());
        stub.GetRecentMsg(&cntl, &req, &rsp, nullptr);
        if (cntl.Failed() == true) 
        {
            LOG_ERROR("{} - 消息存储子服务调用失败: {}", rid, cntl.ErrorText());
            return false;
        }
        if ( rsp.success() == false) 
        {
            LOG_ERROR("{} - 获取会话 {} 最近消息失败: {}", rid, cssid, rsp.errmsg());
            return false;
        }
        if (rsp.msg_list_size() > 0) 
        {
            msg.CopyFrom(rsp.msg_list(0));
            return true;
        }
        return false;
    }

    bool GetUserInfo(const std::string &rid, 
        const std::unordered_set<std::string> &uid_list,
        std::unordered_map<std::string, UserInfo> &user_list) 
    {
        auto channel = _mm_channels->choose(_user_service_name);
        if (!channel) 
        {
            LOG_ERROR("{} - 获取用户子服务信道失败！！", rid);
            return false;
        }
        GetMultiUserInfoReq req;
        GetMultiUserInfoRsp rsp;
        req.set_request_id(rid);
        for (auto &id : uid_list) 
        {
            req.add_users_id(id);
        }
        brpc::Controller cntl;
        free_im::UserService_Stub stub(channel.get());
        stub.GetMultiUserInfo(&cntl, &req, &rsp, nullptr);
        if (cntl.Failed() == true) 
        {
            LOG_ERROR("{} - 用户子服务调用失败: {}", rid, cntl.ErrorText());
            return false;
        }
        if ( rsp.success() == false) 
        {
            LOG_ERROR("{} - 批量获取用户信息失败: {}", rid, rsp.errmsg());
            return false;
        }
        for (const auto & user_it : rsp.users_info()) 
        {
            user_list.insert(std::make_pair(user_it.first, user_it.second));
        }
        return true;
    }

private:
    ESUser::ptr _es_user;
    FriendApplyTable::ptr _mysql_apply;
    ChatSessionTable::ptr _mysql_chat_session;
    ChatSessionMemeberTable::ptr _mysql_chat_session_member;
    RelationTable::ptr _mysql_relation;
    // 这边是rpc调用客户端相关对象
    std::string _user_service_name;
    std::string _message_service_name;
    ServiceManager::ptr _mm_channels;
};

class FriendServer 
{
public:
    using ptr = std::shared_ptr<FriendServer>;
    FriendServer(const Discovery::ptr service_discoverer, 
        const Registry::ptr &reg_client,
        const std::shared_ptr<elasticlient::Client> &es_client,
        const std::shared_ptr<odb::core::database> &mysql_client,
        const std::shared_ptr<brpc::Server> &server):
        _service_discoverer(service_discoverer),
        _registry_client(reg_client),
        _es_client(es_client),
        _mysql_client(mysql_client),
        _rpc_server(server)
    {}

    ~FriendServer(){}

    // 搭建RPC服务器，并启动服务器
    void start() 
    {
        _rpc_server->RunUntilAskedToQuit();
    }

private:
    Discovery::ptr _service_discoverer;
    Registry::ptr _registry_client;
    std::shared_ptr<elasticlient::Client> _es_client;
    std::shared_ptr<odb::core::database> _mysql_client;
    std::shared_ptr<brpc::Server> _rpc_server;
};

// 建造者模式
class FriendServerBuilder 
{
public:
    //构造es客户端对象
    void make_es_object(const std::vector<std::string> host_list) 
    {
        _es_client = ESClientFactory::create(host_list);
    }

    //构造mysql客户端对象
    void make_mysql_object(
        const std::string &user,
        const std::string &pswd,
        const std::string &host,
        const std::string &db,
        const std::string &cset,
        int port,
        int conn_pool_count) 
    {
        _mysql_client = ODBFactory::create(user, pswd, host, db, cset, port, conn_pool_count);
    }

    // 用于构造服务发现客户端&信道管理对象
    void make_discovery_object(const std::string &reg_host,
        const std::string &base_service_name,
        const std::string &user_service_name,
        const std::string &message_service_name) 
    {
        _user_service_name = user_service_name;
        _message_service_name = message_service_name;
        _mm_channels = std::make_shared<ServiceManager>();
        _mm_channels->declared(user_service_name);
        _mm_channels->declared(message_service_name);
        LOG_DEBUG("设置用户子服务为需添加管理的子服务：{}", user_service_name);
        LOG_DEBUG("设置消息子服务为需添加管理的子服务：{}", message_service_name);
        auto put_cb = std::bind(&ServiceManager::onServiceOnline, _mm_channels.get(), std::placeholders::_1, std::placeholders::_2);
        auto del_cb = std::bind(&ServiceManager::onServiceOffline, _mm_channels.get(), std::placeholders::_1, std::placeholders::_2);
        _service_discoverer = std::make_shared<Discovery>(reg_host, base_service_name, put_cb, del_cb);
    }

    // 用于构造服务注册客户端对象
    void make_registry_object(const std::string &reg_host,
        const std::string &service_name,
        const std::string &access_host) 
    {
        _registry_client = std::make_shared<Registry>(reg_host);
        _registry_client->registry(service_name, access_host);
    }

    void make_rpc_server(uint16_t port, int32_t timeout, uint8_t num_threads) 
    {
        if (!_es_client) 
        {
            LOG_ERROR("还未初始化ES搜索引擎模块！");
            abort();
        }
        if (!_mysql_client) 
        {
            LOG_ERROR("还未初始化Mysql数据库模块！");
            abort();
        }
        if (!_mm_channels) 
        {
            LOG_ERROR("还未初始化信道管理模块！");
            abort();
        }
        _rpc_server = std::make_shared<brpc::Server>();

        FriendServiceImpl *friend_service = new FriendServiceImpl(_es_client,
            _mysql_client, _mm_channels, _user_service_name, _message_service_name);
        int ret = _rpc_server->AddService(friend_service, 
            brpc::ServiceOwnership::SERVER_OWNS_SERVICE);
        if (ret == -1) 
        {
            LOG_ERROR("添加Rpc服务失败！");
            abort();
        }

        brpc::ServerOptions options;
        options.idle_timeout_sec = timeout;
        options.num_threads = num_threads;
        ret = _rpc_server->Start(port, &options);
        if (ret == -1) 
        {
            LOG_ERROR("服务启动失败！");
            abort();
        }
    }

    // 构造RPC服务器对象
    FriendServer::ptr build() 
    {
        if (!_service_discoverer)
        {
            LOG_ERROR("还未初始化服务发现模块！");
            abort();
        }
        if (!_registry_client) 
        {
            LOG_ERROR("还未初始化服务注册模块！");
            abort();
        }
        if (!_rpc_server) 
        {
            LOG_ERROR("还未初始化RPC服务器模块！");
            abort();
        }

        FriendServer::ptr server = std::make_shared<FriendServer>(
            _service_discoverer, _registry_client,
            _es_client, _mysql_client, _rpc_server);
        return server;
    }

private:
    Registry::ptr _registry_client;
    std::shared_ptr<elasticlient::Client> _es_client;
    std::shared_ptr<odb::core::database> _mysql_client;
    std::string _user_service_name;
    std::string _message_service_name;
    ServiceManager::ptr _mm_channels;
    Discovery::ptr _service_discoverer;
    std::shared_ptr<brpc::Server> _rpc_server;
};

}